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单选题
A technician is dispatched to a location. While working, the technician’s cell phone rings. Which of the following actions should the technician take?（）
A
Answer the call to determine its importance.
B
Ignore the call and return the call from a land line.
C
Answer the call and leave the location in order to talk.
D
Silence the phone and allow the call to go to voice mail.
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